Zjq Radiation Therapy Review

Front 1

tempature conversion
C to F

Back 1

C x 1.8 + 32 = F

Front 2

Tempature conversion
F to C

Back 2

(F - 32) x 1.8 = C

Front 3

Effective Field size

Back 3

Larger FS - Smaller FS = square root of answer

Front 4

treatmemt error

Back 4

(intended) squared
____________
(actual) squared

Front 5

Maynard F factor

Back 5

(SSD2+Dmax)/(SSD2+d) squared
__________________________________
(SSD1+Dmax)/(SSD1+d) squared

F Factor x original PDD = New PDD

Front 6

ISF

Back 6

(SSD1) squared
________________
(SSD2) squared

Front 7

pressure corretion

Back 7

760 x 273.5 + Temp
_____ ______________
P 295.5

Front 8

field size

Back 8

A = a
___ ____
B b

Front 9

equivelent square

Back 9

4 x area/perimeter

Front 10

inverse square

Back 10

I1 = (D2) squared
__ _____________
I2 (D1) squared

Front 11

skin gap

Back 11

(L1 x d) + (L2 x d)
____ ___ _____ ___
(2 SSD1) (2 SSD2)

Front 12

wedge angle

Back 12

(180 - hinge angle)
___________________ = Wedge angle
2

Front 13

beam divergence

Back 13

(edge lenght)
______________ /100 then 2nd tan
2

Front 14

MU (using PDD)

Back 14

Prescribed dose
______________________________
RDR x ISCF x Sc x Sp x (PDD/100) x other

Front 15

MU (using TMR)

Back 15

Presciribed dose
__________________________________
RDR x ISCF x Sc x Sp x TMRx other

Sc= collimator size
Sp and TMR= EFS

Front 16

Electron MU

Back 16

Prescribed dose
_____________________________
(OP factor) x (cutout factor) x (PDD)

OP factor= cone
Cutout= cutout

Front 17

Electron
90% line

Back 17

e
__
4

Front 18

electron
80% line

Back 18

e
__
3

Front 19

Electron
50 % line or standard

Back 19

e
_
2

Front 20

average life

Back 20

1.44 (half life)

Front 21

theraputic ratio

Back 21

normal tissue tolerance
_________________________
tumor lethal dose

Front 22

pounds to Kg

Back 22

1 Kg = 2.2 Pounds

Front 23

cerrobend to lead conversion

Back 23

1 cm of lead = 1.2 cm of cerrobend